This section describes commands that print user-related information: logins, groups, and so forth.
|• id invocation||Print user identity.|
|• logname invocation||Print current login name.|
|• whoami invocation||Print effective user ID.|
|• groups invocation||Print group names a user is in.|
|• users invocation||Print login names of users currently logged in.|
|• who invocation||Print who is currently logged in.|